Prove that $<C(G), C(G)>$ is dual system with bilinear form $$\int_G \phi(x)\psi(x)dx $$ and $\psi(x),\psi(x)\in C(G)$
so here i was trying bilinear form im not getting how to prove non-degenerate
definition of the non-degenerate bilinear form is in Linear Integral Equations By Raimer Kress